AISI 1043 Steel, Normalized Cold Drawn,UNS G10430

AISI 1043 Steel, Normalized Cold Drawn Bar (UNS G10430) Product Information -:- For detailed product information, please contact sales. -: AISI 1043 Steel, Normalized Cold Drawn Bar (UNS G10430) Synonyms -:- For detailed product information, please contact sales. -:

AISI 1043 Steel, Normalized Cold Drawn Bar (UNS G10430) Product Information -:- For detailed product information, please contact sales. -: ### **Technical Data Sheet: AISI 1043 Normalized Cold Drawn Steel Bar (UNS G10430)** --- #### **1. Product Overview** AISI 1043 Normalized Cold Drawn Bar represents an advanced-processed medium-carbon steel product that combines the dimensional precision of cold drawing with the microstructural benefits of a subsequent normalizing heat treatment. This dual processing method delivers superior dimensional accuracy, enhanced mechanical consistency, and optimal machinability while eliminating the directional properties and residual stresses typical of standard cold drawn material. The normalized condition provides a fine, uniform grain structure throughout the cross-section, making it ideal for precision components requiring predictable performance and minimal distortion during machining. --- #### **2. Key Characteristics & Advantages** - **Enhanced Dimensional Stability:** Combines cold drawing accuracy with stress relief from normalizing - **Isotropic Mechanical Properties:** Eliminates anisotropy for uniform strength in all directions - **Superior Machinability:** Fine pearlitic-ferritic structure provides excellent chip formation - **Improved Fatigue Resistance:** Refined grain structure enhances performance under cyclic loads - **Reduced Distortion:** Minimal residual stresses prevent warping during machining - **Consistent Heat Treatment Response:** Uniform microstructure ensures predictable hardening - **Excellent Surface Quality:** Bright, scale-free finish with tight dimensional tolerances --- #### **3. Chemical Composition** | Element | Composition Range (%) | Standard Reference | |---------|----------------------|-------------------| | **Carbon (C)** | 0.40 - 0.47 | ASTM A108 / SAE J403 | | **Manganese (Mn)** | 0.70 - 1.00 | ASTM A108 / SAE J403 | | **Phosphorus (P)** | ≤ 0.040 | ASTM A108 / SAE J403 | | **Sulfur (S)** | ≤ 0.050 | ASTM A108 / SAE J403 | | **Silicon (Si)** | 0.15 - 0.35 | ASTM A108 / SAE J403 | | **Iron (Fe)** | Balance | - | *Note: The elevated manganese range (0.70-1.00%) distinguishes AISI 1043 from standard 1042 steel, providing improved hardenability.* --- #### **4. Manufacturing Process Sequence** 1. **Hot Rolling:** Initial reduction to near-final dimensions 2. **Cold Drawing:** Precision sizing (typically 10-20% reduction) 3. **Normalizing Heat Treatment:** 870-925°C (1600-1700°F), air cool 4. **Optional Stress Relieving:** 600-650°C (1110-1200°F) if specified 5. **Final Inspection:** Dimensional, surface, and quality verification --- #### **5. Typical Mechanical Properties (Normalized Condition)** | Property | Value Range | Test Standard | |----------|-------------|---------------| | **Tensile Strength** | 620 - 760 MPa (90 - 110 ksi) | ASTM A370 | | **Yield Strength (0.2% offset)** | 380 - 500 MPa (55 - 73 ksi) | ASTM A370 | | **Elongation in 50mm (2")** | 18% - 24% | ASTM A370 | | **Reduction of Area** | 45% - 55% | ASTM A370 | | **Brinell Hardness** | 174 - 229 HB | ASTM E10 | | **Surface Roughness (Ra)** | 0.8 - 1.6 µm (32 - 63 µin) | ASME B46.1 | | **Modulus of Elasticity** | 200 GPa (29,000 ksi) | ASTM E111 | | **Impact Strength (Charpy V-notch, 20°C)** | 45 - 65 J (33 - 48 ft-lb) | ASTM A370 | | **Fatigue Strength (Rotating Bending, 10⁷ cycles)** | 280 - 340 MPa | - | | **Machinability Rating** | ~60% (relative to 1212 steel) | - | --- #### **6. Microstructural Characteristics** - **Grain Size:** ASTM 6-8 (fine-grained) - **Microstructure:** Fine pearlite with proeutectoid ferrite grain boundaries - **Decarburization Depth:** ≤ 0.20 mm (0.008 in) maximum - **Non-Metallic Inclusions:** ASTM E45, ≤ 2.0 (thin series) - **Band Segregation:** Minimal to none --- #### **7. Physical & Thermal Properties** | Property | Value | |----------|-------| | **Density** | 7.87 g/cm³ (0.284 lb/in³) | | **Thermal Conductivity (20°C)** | 49.2 W/m·K (34.1 BTU·in/hr·ft²·°F) | | **Specific Heat Capacity (20°C)** | 486 J/kg·K (0.116 BTU/lb·°F) | | **Coefficient of Thermal Expansion (20-100°C)** | 11.3 µm/m·°C (6.3 µin/in·°F) | | **Electrical Resistivity (20°C)** | 0.210 µΩ·m | | **Magnetic Properties** | Ferromagnetic | | **Acoustic Velocity** | 5900 m/s (19,400 ft/s) | --- #### **8. International Standard Equivalents** | Standard System | Designation | Comparable Specification | |----------------|-------------|----------------------| | **UNS** | G10430 | Unified Numbering System | | **SAE/AISI** | 1043 | SAE J403 | | **ASTM** | Grade 1043 | ASTM A108 (with normalizing) | | **EN (Europe)** | 1.1191 (C42E) | EN 10083-2 | | **ISO** | C42E | ISO 683-18 | | **JIS (Japan)** | S45C | JIS G4051 | | **GB (China)** | 45# (45钢) | GB/T 699 | | **DIN (Germany)** | 1.1191, Ck42 | DIN 17200 | --- #### **9. Response to Further Heat Treatment** **Annealing:** 790-815°C (1450-1500°F), furnace cool to 480°C (900°F), then air cool **Quenching & Tempering Parameters:** - **Austenitizing:** 830-855°C (1525-1575°F), 30 min/inch thickness - **Quenching Medium:** Oil (H25) preferred for minimal distortion - **Tempering Range:** 425-650°C (800-1200°F), 1-2 hours/inch - **Resulting Properties:** 850-1100 MPa UTS, 30-40 HRC typical **Surface Hardening Capabilities:** - **Induction Hardening:** Surface 55-62 HRC, case depth 1-5 mm adjustable - **Flame Hardening:** Similar results with proper temperature control - **Nitriding:** Excellent response for surface hardness >1000 HV --- #### **10. Primary Applications** **Automotive & Transportation:** - Transmission shafts and synchronizer hubs - Steering system precision components - Fuel injection pump parts - Turbocharger shafts and components - Precision gear blanks **Industrial Machinery:** - CNC machine tool spindles and lead screws - High-speed pump shafts and impellers - Hydraulic valve bodies and spools - Precision bearing races - Robotic arm components **Aerospace & Defense:** - Actuator shafts and components - Landing gear precision parts - Missile guidance components - Optical mounting systems **Medical & Dental Equipment:** - Surgical instrument components - Dental drill handpieces - Diagnostic equipment shafts - Prosthetic manufacturing tooling **General Precision Engineering:** - Metrology equipment components - Precision fixtures and jigs - Optical instrument mounts - Semiconductor manufacturing parts --- #### **11. Fabrication Characteristics** **Machining Performance:** - **Turning:** Excellent chip control, surface finishes < 1.6 µm Ra achievable - **Milling:** Consistent tool life, minimal edge buildup - **Drilling/Tapping:** Good chip evacuation, reduced tap breakage - **Grinding:** Predictable stock removal, excellent surface integrity - **Recommended Cutting Speeds:** 35-55 m/min (115-180 ft/min) **Welding & Joining:** - **Pre-heating:** 150-200°C (300-400°F) recommended - **Electrodes:** E7018, E8018-G for shielded metal arc - **Gas Welding:** Oxy-acetylene with appropriate filler - **Post-Weld Treatment:** 600-650°C (1110-1200°F) stress relief **Finishing Operations:** - **Polishing:** Excellent for mirror finishes - **Plating:** Superior substrate for hard chrome, nickel, or zinc - **Anodizing:** Not applicable (ferrous material) - **Painting:** Excellent adhesion with proper surface preparation --- #### **12. Quality Assurance & Testing** **Dimensional Tolerances:** - **Diameter:** ±0.03 mm (±0.0012 in) for precision grades - **Straightness:** ≤ 0.08 mm per 300 mm (≤ 0.003 in per foot) - **Roundness:** ≤ 0.02 mm (≤ 0.0008 in) - **Surface Finish:** 0.8-1.6 µm Ra standard **Testing Protocol:** - Chemical analysis per ASTM E415 (spark emission) - Mechanical testing each production lot - Microstructural examination per ASTM E112 - Hardness traverses across diameter - Non-destructive testing (UT, MT) available - Statistical process control documentation **Certification Requirements:** - Full traceability from melt to final product - Normalizing temperature-time records - Complete mechanical property reports - Microphotographs upon request - Compliance certificates (ISO 9001, IATF 16949) --- #### **13. Storage & Handling Protocol** - **Storage Environment:** 15-25°C, <50% relative humidity - **Packaging:** VCI paper wrapping, plastic end caps - **Stacking:** Maximum 1.5 meter height with proper supports - **Handling:** Non-marring nylon slings recommended - **Shelf Life:** 18 months in original packaging - **Inspection:** Quarterly visual inspection recommended --- #### **14. Comparative Analysis** | Property | Standard Cold Drawn | Normalized Cold Drawn | Advantage | |----------|-------------------|----------------------|-----------| | **Yield Strength** | 550-690 MPa | 380-500 MPa | Better machinability | | **Elongation** | 12-17% | 18-24% | Improved ductility | | **Residual Stress** | High | Minimal | Reduced distortion | | **Machinability** | 45% | 60% | Faster machining | | **Fatigue Strength** | 240-300 MPa | 280-340 MPa | Longer service life | | **Cost Premium** | Base | 20-30% | Value in precision apps | --- #### **15. Technical Guidelines for Designers** 1. **Stress Concentrations:** Maximum recommended stress concentration factor Kt = 2.5 2. **Surface Finish:** For fatigue applications, specify Ra < 1.6 µm 3. **Heat Treatment:** Consider final heat treatment before specifying tolerances 4. **Corrosion Protection:** Recommend plating or coating for humid environments 5. **Quality Level:** Specify required testing level based on application criticality --- **Disclaimer:** This technical specification provides comprehensive information about AISI 1043 Normalized Cold Drawn Steel Bars. Properties may vary based on specific manufacturing parameters, section sizes, and heat treatment conditions. For critical applications, consult with material engineers, review certified test reports, and conduct application-specific validation testing. This premium-grade material is specifically engineered for applications where dimensional stability, machinability, and predictable performance are paramount requirements. --- **Revision:** 1.2 **Date:** October 2023 **Status:** Current Specification -:- For detailed product information, please contact sales. -: AISI 1043 Steel, Normalized Cold Drawn Bar (UNS G10430) Specification Dimensions Size： Diameter 20-1000 mm Length <4807 mm Size:We can customized as required Standard： Per your request or drawing We can customized as required Properties（Theoretical） Chemical Composition -:- For detailed product information, please contact sales. -: AISI 1043 Steel, Normalized Cold Drawn Bar (UNS G10430) Properties -:- For detailed product information, please contact sales. -:

Applications of AISI 1043 Steel, Normalized Cold Drawn Bar (UNS G10430) -:- For detailed product information, please contact sales. -: Chemical Identifiers AISI 1043 Steel, Normalized Cold Drawn Bar (UNS G10430) -:- For detailed product information, please contact sales. -:

Packing of AISI 1043 Steel, Normalized Cold Drawn Bar (UNS G10430) -:- For detailed product information, please contact sales. -: Standard Packing: -:- For detailed product information, please contact sales. -: Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and steel drums to 1 ton super sacks in full container (FCL) or truck load (T/L) quantities. Research and sample quantities and hygroscopic, oxidizing or other air sensitive materials may be packaged under argon or vacuum. Solutions are packaged in polypropylene, plastic or glass jars up to palletized 1278 gallon liquid totes Special package is available on request. E FORUs’ is carefully handled to minimize damage during storage and transportation and to preserve the quality of our products in their original condition